Bug 152930

Summary:	Jumpy text and off-by-one-pixel errors in Calc with 150% high-DPI scaling
Product:	LibreOffice	Reporter:	Freddie Witherden <freddie>
Component:	Calc	Assignee:	Not Assigned <libreoffice-bugs>
Status:	NEW ---
Severity:	minor	CC:	aron.budea, ilmari.lauhakangas, redmoon1945, rustamabd
Priority:	medium
Version:	7.4.3.2 release
Hardware:	All
OS:	Linux (All)
Whiteboard:
Crash report or crash signature:		Regression By:
Bug Depends on:
Bug Blocks:	90796
Attachments:	Issues as shown on a simple calc sheet (see red line annotations)

Description Freddie Witherden 2023-01-08 16:19:51 UTC

Description:
On Linux the drawing code in Calc appears to have issues with fractional scaling that results in text/line art corruption.  This includes cell lines breaking up, and pieces of text being cut off/overdrawn (see screenshot where issues are identified in red).  On window blur the issues resolve themselves.

Steps to Reproduce:
1. On an X11 Linux system with a high-DPI display open up a new Calc document.
2. Populate some cells with content.
3. Use the arrow keys to move around cells, soon on-screen corruption will begin to appear.

Actual Results:
Text and line art is corrupted after moving around a few cells.  Can also be triggered by typing into a cell.

Expected Results:
There should be no cropping/overdrawing/misalignment.


Reproducible: Always


User Profile Reset: No

Additional Info:
UI renderer: default; VCL: kf5 (cairo+xcb).

Comment 1 Freddie Witherden 2023-01-08 16:20:39 UTC

Created attachment 184526 [details]
Issues as shown on a simple calc sheet (see red line annotations)

Comment 2 Buovjaga 2023-08-11 14:15:18 UTC

*** Bug 155513 has been marked as a duplicate of this bug. ***

Comment 3 Buovjaga 2023-08-11 14:16:08 UTC

NEW per duplicate

Comment 4 Buovjaga 2024-04-10 16:55:59 UTC

*** Bug 160486 has been marked as a duplicate of this bug. ***

Comment 5 Timur 2024-04-10 17:33:45 UTC

I could assume this is a duplicate of bug 154602